rna copies dna ch. 10.2 (p.190-192)

RNA copies DNACh. 10.2 (p.190-192)

• RNA = ribonucleic acid; has an extra oxygen, otherwise very similar to DNA

• Big difference: instead of using the nucleotide Thymine (T), RNA uses nucleotide Uracil (U)

• So now A—U and G—C • RNA is like a computer disk

or flash drive• Copies information on one

computer: DNA in nucleus• Takes info to another computer:

ribosomes outside the nucleus

RNA copies DNACh. 10.2 (p.190-192)

RNA comes in 3 types• 1. mRNA = messenger

RNA, the RNA acts as a messenger

• Single uncoiled chain of RNA

• Carries genetic info from DNA to outside the nucleus

RNA copies DNACh. 10.2 (p.190-192)

• Transcription = literally means rewriting ,

• Rewriting info on DNA to a molecule of mRNA

• Promoter region on DNA is where to start copying, termination region on DNA is where to stop copying

RNA copies DNACh. 10.2 (p.190-192)

RNA comes in 3 types• 2. tRNA = transfer RNA,

the RNA transfers the info from mRNA into proteins

• Single chain of about 80 nucleotides folded into hairpin shape

• Kind of looks like a t• Will discuss in 10.3

RNA copies DNACh. 10.2 (p.190-192)

RNA comes in 3 types• 3. rRNA = ribosomal

RNA, RNA that makes the ribosomes

• Ribosomes are where proteins are made

• Will discuss in 10.3

RNA copies DNACh. 10.2 (p.190-192)